- No ke aha e kipa aku ai iā YUANTAI DERUN- Tianjin Yuantai Derun Pipe Manufacturing Group Co., Ltd., i hoʻokumu ʻia ma Malaki 2002, * ʻO ka mea hana nui loa i ʻike ʻia i ka ERW square & rectangular tube / pipe, hollow section structure pipe, galvanized pipe a me spiral welding pipe ma Kina. .
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